High Charge Carrier Mobilities and Lifetimes in Organolead Trihalide Perovskites
نویسندگان
چکیده
Organolead trihalide perovskites are shown to exhibit the best of both worlds: charge-carrier mobilities around 10 cm2 V−1 s−1 and low bi-molecular charge-recombination constants. The ratio of the two is found to defy the Langevin limit of kinetic charge capture by over four orders of magnitude. This mechanism causes long (micrometer) charge-pair diffusion lengths crucial for flat-heterojunction photovoltaics.
منابع مشابه
Distinct exciton dissociation behavior of organolead trihalide perovskite and excitonic semiconductors studied in the same system.
The nonexcitonic character for organometal trihalide perovskites is demonstrated by examining the field-dependent exciton dissociation behavior. It is found that photogenerated excitons can be effectively dissociated into free charges inside perovskite without the assistance of charge extraction layer or external field, which is a stark contrast to the charge-separation behavior in excitonic ma...
متن کاملAre Mobilities in Hybrid Organic−Inorganic Halide Perovskites
Actually “High”? T outstanding performance of hybrid organic−inorganic perovskites (HOIPs) in photovoltaic (PV) devices is made possible by, among other things, outstanding semiconducting properties: long real charge carrier diffusion lengths, L, of up to 5 and possibly even 10 μm, as well as a lifetime τ of ∼1 μs or more in single-crystal and polycrystalline films. Top electronic transport mat...
متن کاملExciton localization in solution-processed organolead trihalide perovskites.
Organolead trihalide perovskites have attracted great attention due to the stunning advances in both photovoltaic and light-emitting devices. However, the photophysical properties, especially the recombination dynamics of photogenerated carriers, of this class of materials are controversial. Here we report that under an excitation level close to the working regime of solar cells, the recombinat...
متن کاملVapour-Deposited Cesium Lead Iodide Perovskites: Microsecond Charge Carrier Lifetimes and Enhanced Photovoltaic Performance
Metal halide perovskites such as methylammonium lead iodide (MAPbI3) are highly promising materials for photovoltaics. However, the relationship between the organic nature of the cation and the optoelectronic quality remains debated. In this work, we investigate the optoelectronic properties of fully inorganic vapour-deposited and spin-coated black-phase CsPbI3 thin films. Using the time-resolv...
متن کاملAre Mobilities in Hybrid Organic-Inorganic Halide Perovskites Actually "High"?
The outstanding performance of hybrid organic-inorganic perovskites (HOIPs) in photovoltaic devices is made possible by, among other things, outstanding semiconducting properties: long real charge-carrier diffusion lengths, L, of up to 5 and possibly even 10 μm, as well as a lifetime, τ of ~1 μs or more in single crystal and polycrystalline films. 1–9 Top electronic transport materials will hav...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
عنوان ژورنال:
دوره 26 شماره
صفحات -
تاریخ انتشار 2014